If you weren’t aware, London Heathrow airport relented recently and installed a new viewing area for plane spotting (here’s our report about its opening). The major drawback, however, was that it is located in the departures section of Terminal 4, so you’ll need an airline ticket to use it. Nevertheless, anything is better than nothing and you can also show up for your flight really early to make sure you get chance to enjoy it.
To give you an idea of what the Terminal 4 viewing area is like, here’s a decent video (by Dantorp Aviation) showing arrivals, departures and aircraft taxiing around the airport as seen from this area. The view is pretty good and you won’t miss much.